What type of material does not transfer heat well? O A. A thermal insulator, such as water
O B. A thermal insulator, such as air
O C. A thermal conductor, such as water
O D. A thermal conductor, such as air

Acave rescue team lifts an injured spelunker directly upward and out of a sinkhole by means of a motor-driven cable. the lift is performed in three stages, each requiring a vertical distance of 10.0 m: (a) the initially stationary spelunker is accelerated to a speed of 4.90 m/s; (b) he is then lifted at the constant speed of 4.90 m/s; (c) finally he is decelerated to zero speed. how much work is done on the 68.0 kg rescue by the force lifting him during each stage?

What is a neurotransmitter involved in mood reward, addiction, and motor behaviors?

How can you increase the strength of an electromagnet?